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chromium/third_party/blink/web_tests/external/wpt/html/editing/dnd/platform/keyboardshortcuts.html 

<!doctype html>
<html>
  <head>
    <title>Keyboard shortcuts during drag/drop</title>
  </head>
  <body>

    <ol>
      <li>Select some text in this sentence and begin dragging it.</li>
      <li>While dragging, use your keyboard shortcut to reload the page. It should work without cancelling the drag.</li>
      <li>While dragging, use your keyboard shortcut to select all text on the page. It should work without cancelling the drag.</li>
      <li>While dragging, use your keyboard shortcut to open a new tab. It should work without cancelling the drag.</li>
      <li>While dragging, use your keyboard shortcut to switch to another tab. It should work without cancelling the drag.</li>
      <li>While dragging, use your keyboard shortcuts to go back and forward in history (<a href="#next">use this link first to add a history entry if needed</a>). It should work without cancelling the drag.</li>
    </ol>

  </body>
</html>